The great whale of the north, the _Mysticetus_, which our northern neighbours discovered while seeking for an eastern passage to India, a species which never leaves the ice, carries no cirrhipedes. 57 This fact was already known to Iceland fishermen of the twelfth century. The intrepid whalers of these regions used to distinguish a northern whale, without "calcareous plates," from a southern whale with plates, that is to say, with cirrhipedes. This latter whale is the celebrated species of temperate regions, the _Nord-Kaper_ which the Basques used to hunt, from the sixth century, in the Channel, and which they used afterwards to pursue even to Newfoundland. The whales of the southern hemisphere, like those of the Pacific Ocean, all have their own species of cirrhipedes. We found in the museum of the Zoological Garden at Amsterdam, a _Coronula_, brought from Japan by Mr. Blomhof, known under the name of _Coronulæ reginæ_, which, no doubt, characterizes the whale of those latitudes. Another northern whale, the _Keporkak_ of the Greenlanders, very remarkable for its long fins, which give it the name of _Megaptera_, is covered very early in its life with these crustaceans, so much so, that the Greenlanders imagine that they are born with them. Some even have pretended to have seen Megapteræ covered with these coronulæ before their birth. Eschricht has in vain offered a reward to him who would send him coronulæ still attached to the umbilical cord; he has only received some pieces of skin covered with hairy bulbs. There is no doubt that young whales have been seen and captured while following their mother, which were already covered by these crustaceans. Steenstrup has indicated the presence of _Platycyamus Thompsoni_ on the body of the _Hyperoodons_, and the _Xenobalanus globicipitis_ on the globiceps of the Shetland Isles.